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TPM_20_E_COMMAND_CODE
TPM_20_E_COMMAND_CODE maps to TPM_RC_COMMAND_CODE. The command code is not supported by this TPM implementation. A command can be standard yet unavailable due to the TPM version, firmware capabilities, or configured algorithm and feature set.
What to check before fallback
- Query the TPM command capability set and compare it with the command expected by the calling library.
- Do not infer support from the Windows version alone; inspect the actual TPM capabilities and firmware version.
- Choose the documented alternate workflow only when it provides equivalent semantics for the application.
TCG TPM 2.0 Part 2: TPM_RC_COMMAND_CODE · tpm2_getcap commands
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